Home / 27,921-38,531.04-15,345.84

Finding the Fourth Proportional to 27,921, 38,531.04 and 15,345.84

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Solution

The fourth proportional to 27,921, 38,531.04 and 15,345.84 is: 21,177.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,921 : 38,531.04 = 15,345.84 : x
  2. Step 2: Convert to fraction form
    27,921/38,531.04 = 15,345.84/x
  3. Step 3: Cross multiply
    27,921x = 38,531.04 × 15,345.84
  4. Step 4: Simplify right side
    27,921x = 591,291,174.87
  5. Step 5: Solve for x
    x = 591,291,174.87/27,921
  6. Step 6: Final answer
    x = 21,177.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.